pwm: Enable TI ECAP driver for ARCH_K3

K3 devices have the same ECAP IP as OMAP SoCs. Enable driver to be built
for K3 devices. Also, drop reference to AM33xx in help text, as IP is
found on multiple TI SoCs.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/Kconfig

@@ -447,10 +447,9 @@ config PWM_TEGRA
 
 config  PWM_TIECAP
 	tristate "ECAP PWM support"
-	depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE
+	depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3
 	help
-	  PWM driver support for the ECAP APWM controller found on AM33XX
-	  TI SOC
+	  PWM driver support for the ECAP APWM controller found on TI SOCs
 
 	  To compile this driver as a module, choose M here: the module
 	  will be called pwm-tiecap.